给字符串分组

Question

  string str = "df,122,12e,12g,12e,12d2,12d2,12d2,";
每三个字符分成一个新数组

Answer 1

循环一下长度就可以咯感觉楼主是按逗号分吧？可以用string.Split(',')

Answer 2

split如何把字符串从第三个处分开???

Answer 3

先用string.split(','); 将一个个的字符串放到数组中 
然后再用for循环 每三个一组 记得要加上 ","

Answer 4

string.replace(",",""); //替换掉逗号
再用for循环    可以减小空间复杂度(去掉了一个临时的数组)^_^

Answer 5

string str = "df,122,12e,12g,12e,12d2,12d2,12d2,"; 
str.Replace(",", "");str字符串的值为："df12212e12g12e12d212d212d2"
通过for循环将str字符串3个字符为一组进行分组。

Answer 6

  string str = "";
            int i = 0;
            Dictionary<int, List<string>> dic = new Dictionary<int, List<string>>();
            List<String> lst = new List<string>();
            string[] sp = str.Split(new char[1] { ',' });
            foreach (string s in sp)
            {
                if (i % 3 == 0)
                {
                    dic.Add(i, lst);
                    lst.Clear();
                }
                else
                    lst.Add(s);
                i += 1;
            }
            foreach (KeyValuePair<int, List<string>> kvp in dic)
            {            }

Answer 7

        static string[] Split(string str)
        {
            char[] crs = str.ToCharArray();
            List<string> ret = new List<string>();
            int i = 0;
            string tmp=string.Empty;
            foreach (char ch in crs)
            {
                if (ch == ',')
                    continue;
                tmp += ch;
                if (i == 2)
                {
                    ret.Add(tmp);
                    tmp = string.Empty;
                    i = 0;
                }
                else
                {   
                    i++;
                }
            }
            if (tmp.Length > 0)
            {
                ret.Add(tmp);
            }
            return ret.ToArray();
        }我应该好好练习下算法了。哎

Answer 8

        string newstr=null;
        string str = "df,122,12e,12g,12e,12d2,12d2,12d2,";
        str = str.Replace(",","");
        for (int i = 1; i < str.Length; i++)
        {
            newstr = newstr + str.Substring(i, 1);
            if (i % 3 == 0 && i !=0)
            {
                newstr = newstr + ",";
            }
            
        }
        Response.Write(newstr);

Answer 9

非常感谢.viewstate.
感觉还行

Answer 10

怎么引用不了呀,强类型是如何引用的.
我的报错 CS0246: 找不到类型或命名空间名称“List”(是否缺少 using 指令或程序集引用?)

Answer 11

            List<string> _L = new List<string>();
            while (str.IndexOf(",") > 0)
            {
                int i = str.IndexOf(",", str.IndexOf(",", str.IndexOf(",") + 1) + 1);
                string t = "";
                if (i < 0)
                {
                    t = str;
                    str = str.Remove(0, str.Length);
                }
                else
                {
                    t = str.Substring(0, i);
                    str = str.Remove(0, i + 1);
                }
                _L.Add(t);
            }
            string[] sArry ={ _L[0], _L[1], _L[2] };            for (int i = 0; i < sArry.Length; i++)
            {
                Console.WriteLine(sArry[i]);
                Console.Write("");
            }

Answer 12

”找不到类型或命名空间名称“List”(是否缺少 using 指令或程序集引用?)“用的楼上的list的DEMO吧      说的很明显了    缺少 using 指令或程序集引用

Answer 13

我加了这一句呀
using System.Collections是不是还要加别的

Answer 14

 /// <summary>
        /// 
        /// </summary>
        /// <param name="str">要分割的字符串</param>
        /// <param name="f">分割的组数</param>
        /// <returns></returns>
        static string[] _Result(string str, int f)
        {
            List<string> _L = new List<string>();
            string[] sArry = str.Split(',');            for (int i = 0; i < sArry.Length / f; i++)
            {
                string _s = "";
                for (int j = 0; j < sArry.Length; j++)
                {
                    if (i == j / f)
                    {
                        _s += sArry[j].ToString() + ',';
                    }
                }
                _L.Add(_s);
            }
            return _L.ToArray();
        }

Answer 15

 string str = "df,122,12e,12g,12e,12d2,12d2,12d2,";
            str=str.Replace(",","");
             int count=0;
             List<string> lists = new List<string>();
             while (count <= str.Length-1)
             {
                 if (count + 3 > str.Length)
                 {
                     lists.Add(str.Substring(count));
                 }
                 else
                 {
                     lists.Add(str.Substring(count, 3));
                 }
                 count += 3;
             }
             foreach (string list in lists)
             {
                 Response.Write(list+"<br/>");
             }

Answer 16

楼主用的.NET哪个版本？try...string str = "df,122,12e,12g,12e,12d2,12d2,12d2,";
Regex reg = new Regex(@"([^,]*,){3}|([^,]*,)+$");
MatchCollection mc = reg.Matches(str);
foreach(Match m in mc)
{
    richTextBox2.Text += m.Value + "\n";
}